[tip:perf/urgent] perf tests x86: Fix memory leak in sample_ustack()

[tip-bot for Masanari Iida <tipbot@zytor.com>]

Commit-ID:  763d7f5f2718f085bab5a9e63308349728f3ad12
Gitweb:     http://git.kernel.org/tip/763d7f5f2718f085bab5a9e63308349728f3ad12
Author:     Masanari Iida <standby24x7@gmail.com>
AuthorDate: Sun, 20 Apr 2014 00:16:41 +0900
Committer:  Jiri Olsa <jolsa@redhat.com>
CommitDate: Wed, 23 Apr 2014 13:19:01 +0200

perf tests x86: Fix memory leak in sample_ustack()

The buf is not freed, when kernel failed to get stack map
and return.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Link: http://lkml.kernel.org/r/1398091024-7901-1-git-send-email-standby24x7@gmail.com
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
---
 tools/perf/arch/x86/tests/dwarf-unwind.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/arch/x86/tests/dwarf-unwind.c b/tools/perf/arch/x86/tests/dwarf-unwind.c
index b602ad9..b8c0102 100644
--- a/tools/perf/arch/x86/tests/dwarf-unwind.c
+++ b/tools/perf/arch/x86/tests/dwarf-unwind.c
@@ -26,6 +26,7 @@ static int sample_ustack(struct perf_sample *sample,
 	map = map_groups__find(&thread->mg, MAP__FUNCTION, (u64) sp);
 	if (!map) {
 		pr_debug("failed to get stack map\n");
+		free(buf);
 		return -1;
 	}